Allow Elastika to send raw vector output to Tricorder

[cosinekitty]

Although Elastika only outputs a stereo signal, internally there is a 3D vector available for the output ball. It would be fun to allow graphing this via Tricorder. All I need to do is follow the same Tricorder::Communicator pattern that Frolic and Glee use. Later, this might be a way of sneaking a vector out of Elastika (if I create a Tout module).

[cosinekitty]

There are two vector outputs from Elastika. Should I allow selecting one of them, like Nucleus does?

[cosinekitty]

Yes! I can add a right-click menu item for that later. I will start with sending just the left channel's vector.